Mold appliance



United States Patent MOLD APPLIANCE Henry B. Gans, Jr., Johnstown, Pa.,assignor to United States Steel Corporation, a corporation of New JerseyApplication April 20, 1956, Serial No. 579,522

2 Claims. (Cl. 22134) This invention relates to a mold appliance forpreventing leakage of molten metal into the crevice between a runner cupand a sand mold body.

An object of the invention is to provide a simple and inexpensiveappliance which can be inserted, into a runner cup to prevent suchleakage and thereby overcome the tendency of sand from the mold to washinto the mold cavity.

A more specific object is to provide, in combination with a mold bodyand runner cup, a short length tubular metal shield which covers thecrevice between the body and cup and prevents leakage.

In accomplishing these and other objects of the invention, I haveprovided improved details of structure, a preferred form of which isshown in the accompanying drawing, in which the single figure is avertical section through the upper portion of a sand mold and runner cupshowing my appliance installed therein.

The drawing shows the upper portion of a sand mold 10, which contains aseries of gate tiles 12. A runner cup 13 is positioned over theuppermost tile and rests on the top face of the mold. A crevice 14commonly is present between the mold and cup, being shown somewhatexaggerated. Molten metal introduced to the mold to form a casting ispoured into the runner cup and flows downwardly through gate tiles intothe mold cavity. When the mold is filled, the level of metal lies withinthe runner cup, leaving the usual gate extending from the casting. Inthe absence of my appliance, molten metal from the gate tends to leakinto the crevice 14,

2,784,467 Patented Mar. 12, 1957 lift the runner cup from its properposition, and wash sand into the mold cavity. I

In accordance with my invention, an appliance in the form of a shortlength tubular metal shield 15 is inserted into the runner cup 13 andupper portion of the uppermost gate tile 12 and covers the crevice 14.The pouring opening in the runner cup conventionally tapers downwardly,and the upper edge of the shield has an outwardly extending head orflange 16 that engages the tapered surface to support the shield andprevent its being washed into the mold cavity. The shield preventsleakage into the crevice, and when the casting is removed from the mold,remains welded to the gate.

While I have shown and described only a single embodiment of myinvention, it is apparent that other'modifications may arise. Therefore,I do not wish to be limited to the disclosure set forth but only by thescope of the appended claims.

I claim:

1. The combination, with a sand mold having a series of gate tilestherein and a runner cup resting on its upper face over said gate tiles,of an appliance comprising a tubular metal shield inserted within saidcup and the uppermost tile and covering the crevice between the cup andthe mold to prevent leakage.

2. The combination, with a sand mold having a series of gate tilestherein and a runner cup resting on its upper face over said gate tiles,said cup having a downwardly tapered pouring opening, of an appliancecomprising a tubular metal shield inserted within said cup and theuppermost tile and covering the crevice between the cup and the mold toprevent leakage, and means extending from the upper edge of said shieldengaging the surface of said tapered opening to support the shield andprevent its being washed into the mold cavity.

References Cited in the file of this patent UNITED STATES PATENTS1,139,885 Mellen May 18, 1915 2,341,589 Anthony Feb. 15, 1944 2,459,025Graham Jan. 11, 1949 FOREIGN PATENTS 852,126 Germany Oct. 13, 1952

